Dear aspirant,

As per this rank I would be giving predictions on the basis of my knowledge so it may vary a bit depending on certain factors like number of candidates appearing in the examination, number of vacant seats in college, previous years cut offs and difficulty level of the paper.

So, as per 20k rank you need to score atleast 160 out off 300 on a general basis . It can be even more than that or even less than that based on the above mentioned factors.

For more information you can check out the link given below-

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile